HomeMy WebLinkAbout20230180 Ver 1_SWM Report_20230407STORMWATER REPORT
WEDDINGTON PLACE APARTMENTS
Davidson County
Lexington, NC
TSH Holdings, LLC.
1101 Ivey Road, NC 27253
Ph: (919) 708-7407
ttommv27320AYahoo.com
January 24, 2023
Project No. 21-081
ittl fill,
SEAL
036233
!lryu11
Jeremy L McCall, P.E.
Green Mountain Engineering, PLLC
lA Wendy Court
Greensboro, 27409
(336) 294-9394
Certificate #P-0826
Introduction
The Weddington Place Apartments project is located in the City of Lexington. The project consists of
developing a 42.791 acre property, currently owned by Weddington Apartments of Lexington, LLC.
The site is located on Brown Street, approximately 550 feet west from the intersection of Cotton Grove
Road and Brown Street. The site generally consists of five main drainage points where water leaves the
site to the south (DP #A-E).
The property will follow the stormwater regulations for treatment of water quantity and water quality
thru four wet detention basins. Offsite water from the west will be diverted around the site through pipes
BPI -7. This is modeled as DA Bypass to DA-A. Offsite water from the north on the east side of the
project will be diverted around the site through STP-138, STP-139, and STP-140. This is modeled as
DA Bypass to DA-C. There are small areas that bypass the wet detention basins due to elevations and
natural drainage patterns. These are modeled as DA Bypass SCM#. Drainage to DP D and E in the post
development condition does not include imperious area.
Post Construction BUA on site is 851,892 sf (or 19.56 Acres); surface runoff from this BUA will pass
through the four wet detention basins. There is no BUA existing or proposed from off -site to be treated
by the wet detention basins.
Methodology
The stormwater quality analysis was prepared using the updated NCDEQ Stormwater Design Manual.
This includes using the Simple Method for Runoff Volume (part B of NCDEQ Stormwater Manual)
calculate the Design Volume for stormwater treatment. C-2 Bio-Cell of the NCDEQ Stormwater
Manual was used for design of the 12 Minimum Design Criteria (MDC).
The stormwater analysis was prepared using the "Hydraflow Hydrographs Extension for AutoCAD
Civil3D, Version 2022. The method involves inputting the CN values, calculated by Table 2-2a of
TR-55 (per the soil survey for hydrological soil group), time of concentrations (per Chapter 3 TR-55),
and drainage area to obtain an output flow based on Soil Conservation Service's TR-55 methods for the
2-yr and 10-yr 24-hour rainfall events. This process was performed for both the pre and post
development conditions in order to get a peak discharge and volumes of stormwater runoff of the post
construction does not excide the pre development runoff conditions. The program was then used to
route the storm events thru the wet detention basins to show the requirements are being met.
Procedure
Five drainage points was determined for this project based upon the existing drainage areas. Drainage
Point "A-E" was determined to be along the property's southern boundary where surface runoff
ultimately flows to Swearing Creek/High Rock Lake.
Per the U.S. DEPARTMENT OF AGRICULTURE website, hydrological soil groups were found to be
CcB (Cecil sandy loam, 2 to 8 percent slopes), DdB (Davidson loam, 2 to 8 percent slopes) and DdE
(Davidson loam, 15 to 25 percent slopes). Table 3 of the NCDEQ Stormwater Design Manual, CcB,
DdB and DdE are hydrological soil groups B. For hydrological soil group B, CN values of 80 for
Residential Apartments, 70 for Residential (less than 25% IMP), 60 for Woods, Good condition were
used.
Pre -Developed Condition (See Appendix A for CN):
DP -A (Hydrograph 1 Z
Area: 25.65 Acres
Composite CN: 64
Time of Concentration: Tc = 50.9 Minutes.
DP-B (Hydrograph 2):
Area: 25.71 Acres
Composite CN: 61
Time of Concentration: Tc = 45.0 Minutes.
DP-C Hydrograph 3):
Area: 19.82 Acres
Composite CN: 66
Time of Concentration: Tc = 42.80 Minutes.
DP-D (Hydrograph 4):
Area: 1.41 Acres
Composite CN: 60
Time of Concentration: Tc = 17.0 Minutes.
DP-E Hydrograph 5):
Area: 1.98 Acres
Composite CN: 60
Time of Concentration: Tc = 16.2 Minutes.
Hydrograph No. 23 is the Hydrograph that combines the postconstruction flow for all five drainage
points (Hydrographs 11, 15, 20, 21, & 22) for a Total Pre -development Flow for the site.
Post -Developed Condition (See Appendix B for CN):
Area Draining to DP -A
Off -site DA Bypass A (Hydrograph 6):
Area: 18.32 Acres
Composite CN: 66
Time of Concentration: Tc = 50.9 Minutes.
DA to SCM#3 (Hydrograph 7):
Area: 9.59 Acres
Composite CN: 80
Time of Concentration: Tc = 50.9 Minutes.
DA Bypass SCM#3 (Hydrograph 8):
Area: 1.13 Acres
Composite CN: 61
Time of Concentration: Tc = 50.9 Minutes.
2
Hydrograph No. 18 shows the routing of Hydrograph 7 through SCM#3, Hydrographs 6, 8, and 18 were
combined to get a total post development flow to DP -A and is shown in Hydrograph 20.
Area Draining to DP-B
DA Bypass SCM#1 (Hydrograph 9h
Area: 1.17 Acres
Composite CN: 60
Time of Concentration: Tc = 8.2 Minutes.
DA to SCM#1 (Hydrograph 10):
Area: 18.16 Acres
Composite CN: 71
Time of Concentration: Tc = 35.9 Minutes.
Hydrograph No. 16 shows the routing of Hydrograph 10 through SCM#1, Hydrographs 9 and 16 were
combined to get a total post development flow to DP-B and is shown in Hydrograph 21.
Area Draining to DP-D
DA D (Hydrograph lit
Area: 1.25 Acres
Composite CN: 60
Time of Concentration: Tc = 17.0 Minutes.
Area Draining to DP-C
DA to SCM#2 (Hydrograph 12):
Area: 7.68 Acres
Composite CN: 78
Time of Concentration: Tc = 24.60 Minutes.
DA Bypass SCM#2 (Hydrograph 13 -
Area: 12.75 Acres
Composite CN: 69
Time of Concentration: Tc = 42.1 Minutes.
DA to SCM#4 (Hydrograph 14):
Area: 4.29 Acres
Composite CN: 80
Time of Concentration: Tc = 13.9 Minutes.
Hydrograph No. 17 shows the routing of Hydrograph 12 through SCM#2, Hydrograph 19 shows the
routing of Hydrograph 14 through SCM #4, Hydrographs 13, 17 and 19 were combined to get a total
post development flow to DP-C and is shown in Hydrograph 22.
Area Draining to DP-E
DA E (Hydrograph 15):
Area: 0.53 Acres
Composite CN: 60
Time of Concentration: Tc = 23.30 Minutes.
Hydrograph No. 24 is the Hydrograph that combines the postconstruction flow for all five drainage
points (Hydrographs 11, 15, 20, 21, & 22) for a Total Post -development Flow for the site.
Peak Runoff Quantities were calculated for the pre -development and the post -development condition at
for the entire site. The drainage areas that flow to the wet detention basins were then routed through the
SCMs to obtain peak storm elevation and peak discharge for each storm event. Hydrographs were then
combined for total volume to calculate the storage volumes required for the 2, 10, and 100-YR Storm
Events and the peak combined runoff values were calculated as well.. The 100-YR storm events are
provided to shown no overtopping of the wet detention basins during the 100-YR event.
Summary of Results
A summary of peak flows from the SCS Method are as follows:
SUMMARY TABLE
PEAK Q (CFS)
HDY #
2-YR
10-YR
100-YR
PRE-DEV DA#A
1
1.16
15.29
58.72
PRE-DEV DA#B
2
0.579
13.17
57.4
PRE-DEV DA#C
3
1.487
15.66
55.44
PRE-DEV DA#D
4
0.028
1.215
5.292
PRE-DEV DA#E
5
0.039
1.906
8.127
POST -BYPASS DA-A
6
1.215
12.4
44.2
POST DA SCM#3
7
4.827
17.02
42.1
POST DA BYPASS SCM#3
8
0.041
1.571
6.105
POST DA BYPASS SCM#1
9
0.025
1.507
6.116
POST DA SCM#1
10
3.466
21.58
65.22
POST DA-D
11
0.025
1.077
4.691
POST DA SCM#2
12
4.047
15.51
39.76
POST BYPASS DA SCM#2
13
1.612
12.12
38.92
POST DA SCM#4
14
3.55
12.19
29.67
POST DA-E
15
0.011
0.412
1.83
POST (HYD10) THROUGH SCM#1
16
0.106
13.12
59.53
POST (HDY12) THROUGH SCM#2
17
0.09
0.788
26.78
POST (HDY7)THROUGH SCM#3
18
1 0.102
2.607
33.5
POST (HDY14)THROUGH SCM#4
19
0.091
0.173
10.87
COMBINED POST DA-A (HDY6,8,18)
20
1.306
13.52
78.44
COMBINED POST DA-B (HDY9,16)
21
0.112
13.29
60.41
COMBINED POST DA-C (HDY13,17,19)
22
1.741
12.41
76.47
TOTAL COMBINED PRE (HYD1-5)
23
3.179
44.31
172.57
TOTAL COMINDED POST
(HYD11,15,20-22)
24
3.09
37.51
214.31
Totallncrease
-0.089
-6.8
41.74
11
Conclusion
The intended purpose of the stormwater analysis is to show there are no adverse effects of impervious
construction on the downstream watersheds. For construction of the Weddington Place Apartments
Project, the additional runoff from the increase in ISA, from the post -development is routed through the
stormwater SCMs to remove pollutants, and stormwater control structure is designed to reduce the peak
flow rates to show no adverse impacts to the receiving downstream waterway per the conducted
stormwater study.
The proposed SCMs meets the requirements of the of the City of Lexington Ordinance for the water
quality aspect of treating the 1" runoff volume. The study should satisfy the requirements found in the
City of Lexington Ordinance.
Appendix A
Pre-Develpoment Curve Number Calculations
Project :
Weddington
Date :
1/13/2023
Project No.:
21-048
Designed by:
JLM
Checked by:
JLM
Rational Method C Values
PRE -DEVELOPED CONDITIONS
DRAINAGE AREA A
LAND USE
HYDROL.
GROUP
AREA
(AC.)
AREA
( % )
CURVE NO
(CN)
CN x
AREA
WOODS (Good)
B
14.53
56.01%
60
872
RESIDENTIAL (LESS THAN 25% IMP)
B
11.42
43.99%
70
799
TOTALS 25.95 100.0%
1671
WEIGHTED CN (POST -DEVELOPED) =
64
DRAINAGE AREA B
LAND USE
HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
WOODS (Good)
B
23.09
89.82%
60
1385
RESIDENTIAL (LESS THAN 25% IMP)
B
2.62
10.18%
70
183
TOTALS 25.71 100.0%
1569
WEIGHTED CN (POST -DEVELOPED) =
61
DRAINAGE AREA C
LAND USE
HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
WOODS (Good)
B
12.19
61.51%
60
731
RESIDENTIAL (LESS THAN 25% IMP)
B
2.44
12.32%
70
171
COMMERCIAL
B
j 5.19
j 26.17%
1 80
j 415
TOTALS 19.82 100.0% 1317
WEIGHTED CN (POST -DEVELOPED) = 66
LAND USE
WOODS (Good)
LAND USE
WOODS (Go
DRAINAGE AREA D
HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
B
1.41
100.00%
60
84
TOTALS
1.41
100.0%
84
WEIGHTED CN (PRE -DEVELOPED) =
60
DRAINAGE AREA E
HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
B
1.98
100.00%
60
119
TOTALS
1.98
100.0%
119
WEIGHTED CN (PRE -DEVELOPED) =
60
Appendix B
Post-Develpoment Curve Number Calculations
Project :
Weddington
Date :
1/13/2023
Project No.:
21-081
Designed by:
JLM
Checked by:
JLM
SCS RUNOFF CURVE NUMBERS
DEVELOPED CONDITIONS
DRAINAGE AREA BYPASS A
LAND USE
HYDROL.
GROUP
AREA
(AC.)
AREA
( % )
CURVE NO
(CN)
CN x
AREA
WOODS (Good)
B
7.03
38.39%
60
422
RESIDENTIAL (LESS THAN 25% IMP)
B
11.28
61.56%
70
789
RESIDENTIAL (APARTMENTS)
B
0.01
0.05%
80
1
TOTALS 18.32 100.0%
1212
WEIGHTED CN (POST -DEVELOPED) =
66
DRAINAGE AREA TO SCM #3
LAND USE
HYDROL.
GROUP
AREA
(AC.)
AREA
( % )
CURVE NO
(CN)
CN x
AREA
RESIDENTIAL (LESS THAN 25% IMP)
B
0.08
0.85%
70
6
RESIDENTIAL (APARTMENTS)
B
9.51
99.15%
80
761
TOTALS 9.59 100.0%
766
WEIGHTED CN (POST -DEVELOPED) =
80
DRAINAGE AREA BYPASS SCM#3
LAND USE
HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
WOODS (Good)
B
1.01
89.60%
60
61
RESIDENTIAL (LESS THAN 25% IMP)
B
0.12
10.40%
70
8
TOTALS 1.13 100.0%
69
WEIGHTED CN (POST -DEVELOPED) =
61
I DRAINAGE AREA BYPASS SCM #1 1
LAND USE
WOODS (Good)
HYDROL.
AREA
GROUP
(AC.)
B
1.17
TOTALS
1.17
AREA CURVE NO
(%) (CN)
100.00% 60
100.0%
WEIGHTED CN (PRE -DEVELOPED) =
CN x
AREA
70
70
60
DRAINAGE AREA TO SCM #1
LAND USE
HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
RESIDENTIAL (LESS THAN 25% IMP)
B
15.98
87.96%
70
1118
RESIDENTIAL (APARTMENTS)
B
2.19
12.04%
80
175
TOTALS 18.16 100.0%
1293
WEIGHTED CN (POST -DEVELOPED) =
71
DRAINAGE AREA D
LAND USE HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
WOODS (Good) B
1.25
100.00%
60
75
TOTALS 1.25 100.0%
WEIGHTED CN (POST -DEVELOPED) =
75
60
DRAINAGE AREA TO SCM #2
LAND USE
HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
RESIDENTIAL (LESS THAN 25% IMP)
B
1.31
17.01%
70
91
RESIDENTIAL (APARTMENTS)
B
6.37
82.99%
80
510
TOTALS 7.68 100.0%
601
WEIGHTED CN (POST -DEVELOPED) =
78
DRAINAGE AREA BYPASS SCM #2
LAND USE
HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
WOODS (Good)
B
5.98
46.93%
60
359
RESIDENTIAL (LESS THAN 25% IMP)
B
1.52
11.96%
70
107
RESIDENTIAL (APARTMENTS)
B
5.24
41.11%
80
419
TOTALS 12.75 100.0%
885
WEIGHTED CN (POST -DEVELOPED) =
69
DRAINAGE AREA TO SCM #4
LAND USE HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
RESIDENTIAL (APARTMENTS) B
4.29
100.00%
80
343
TOTALS 4.29 100.0%
WEIGHTED CN (POST -DEVELOPED) =
343
80
LAND USE
WOODS (Good)
DRAINAGE AREA E
HYDROL.
GROUP
AREA
(AC.)
AREA
(%)
CURVE NO
(CN)
CN x
AREA
B
0.53
100.00%
60
32
TOTALS 0.53
100.0%
32
WEIGHTED CN (POST -DEVELOPED) =
60
Appendix D
Hydrographs
Hydrograph Return Period Recce raf low Hydrographs Extension for Autodesk@ Civil 3D@ by Autodesk, Inc. v2022
Hyd.
Hydrograph
Inflow
Peak Outflow (cfs)
Hydrograph
No.
type
hyd(s)
Description
(origin)
1-yr
2-yr
3-yr
5-yr
10-yr
25-yr
50-yr
I 00-yr
1
SCS Runoff
------
-------
1.160
-------
-------
15.29
-------
-------
58.72
PRE DA-A
2
SCS Runoff
------
-------
0.579
-------
-------
13.17
-------
-------
57.40
PRE DA-B
3
SCS Runoff
------
-------
1.487
-------
-------
15.66
-------
-------
55.44
PRE DA-C
4
SCS Runoff
------
-------
0.028
-------
-------
1.215
-------
-------
5.292
PRE DA-D
5
SCS Runoff
------
-------
0.039
-------
-------
1.906
-------
-------
8.127
PRE DA-E
6
SCS Runoff
------
-------
1.215
-------
-------
12.40
-------
-------
44.20
POST BYPASS DA-A
7
SCS Runoff
------
-------
4.827
-------
-------
17.02
-------
-------
42.10
POST DA-SCM#3
8
SCS Runoff
------
-------
0.041
-------
-------
1.571
-------
-------
6.105
POST DA BYPASS SCM #3
9
SCS Runoff
------
-------
0.025
-------
-------
1.507
-------
-------
6.116
POST DA BYPASS SCM#1
10
SCS Runoff
------
-------
3.466
-------
-------
21.58
-------
-------
65.22
POST DA SCM#1
11
SCS Runoff
------
-------
0.025
-------
-------
1.077
-------
-------
4.691
POST DA-D
12
SCS Runoff
------
-------
4.047
-------
-------
15.51
-------
-------
39.76
POST DA SCM#2
13
SCS Runoff
------
-------
1.612
-------
-------
12.12
-------
-------
38.92
POST BYPASS DA SCM#2
14
SCS Runoff
------
-------
3.550
-------
-------
12.19
-------
-------
29.67
POST DA SCM#4
15
SCS Runoff
------
-------
0.011
-------
-------
0.412
-------
-------
1.830
POST DA-E
16
Reservoir
10
-------
0.106
-------
-------
13.12
-------
-------
59.53
POST THROUGH SCM#1
17
Reservoir
12
-------
0.090
-------
-------
0.788
-------
-------
26.78
POST THROUGH SCM#2
18
Reservoir
7
-------
0.102
-------
-------
2.607
-------
-------
33.50
POST THROUGH SCM#3
19
Reservoir
14
-------
0.091
-------
-------
0.173
-------
-------
10.87
POST THROUGH SCM#4
20
Combine
6,8,18,
-------
1.306
-------
-------
13.52
-------
-------
78.44
COMBINED POST DA-A
21
Combine
9, 16,
-------
0.112
-------
-------
13.29
-------
-------
60.41
COMBINED POST DA-B
22
Combine
13,17,19 -
-------
1.741
-------
-------
12.41
-------
-------
76.47
COMBINED POST DA-C
23
Combine
1,2,3,
-------
3.179
-------
-------
44.31
-------
-------
172.57
TOTAL COMBINED PRE
4,5,
24
Combine
11,15,20 -
-------
3.092
-------
-------
37.51
-------
-------
214.31
TOTAL COMBINED POST
21,22,
25
Combine
6,7,8,
-------
5.582
-------
-------
27.51
-------
-------
81.63
Post Total No Route
26
Combine
9, 10,
-------
3.489
-------
-------
21.87
-------
-------
66.21
Post Total B no Route
27
Combine
12,13,14 -
-------
7.763
-------
-------
33.79
-------
-------
92.93
Post Total C No Route
28
Combine
11,15,25 -
-------
15.42
-------
-------
79.51
-------
-------
233.79
Post Total Combined Before Routing
26,27
Proj. file: Wet Ponds2.gpw
Wednesday, 01 / 25 / 2023
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 1
PRE DA-A
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 25.950 ac
Basin Slope
= 2.0 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
2.00
1.00
1
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-A
Hyd. No. 1 -- 2 Year
120 240 360 480 600 720 840 960
Hyd No. 1
Wednesday, 01 / 25 / 2023
= 1.160 cfs
= 764 min
= 16,373 cuft
= 64
= 1594 ft
= 50.90 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 2
PRE DA-B
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 25.710 ac
Basin Slope
= 3.1 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-B
Hyd. No. 2 -- 2 Year
Wednesday, 01 / 25 / 2023
= 0.579 cfs
= 770 min
= 10,721 cuft
= 61
= 1635 ft
= 45.00 min
= Type II
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 2 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 3
PRE DA-C
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 19.820 ac
Basin Slope
= 2.4 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
2.00
1.00
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-C
Hyd. No. 3 -- 2 Year
120 240 360 480 600 720 840 960
Hyd No. 3
Wednesday, 01 / 25 / 2023
= 1.487 cfs
= 750 min
= 15,722 cuft
= 66
= 1517 ft
= 42.80 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 4
PRE DA-D
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 1.410 ac
Basin Slope
= 3.5 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
0.10
0.09
0.08
0.07
0.05
0.04
0.03
0.02
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-D
Hyd. No. 4 -- 2 Year
Wednesday, 01 / 25 / 2023
= 0.028 cfs
= 744 min
= 510 cuft
= 60
= 509 ft
= 17.00 min
= Type II
= 484
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 4 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 5
PRE DA-E
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 1.980 ac
Basin Slope
= 2.2 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
0.10
0.09
0.08
0.07
0.05
0.04
0.03
0.02
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-E
Hyd. No. 5 -- 2 Year
Wednesday, 01 / 25 / 2023
= 0.039 cfs
= 738 min
= 698 cuft
= 60
= 358 ft
= 16.20 min
= Type II
= 484
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 5 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 6
POST BYPASS DA-A
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 18.320 ac
Basin Slope
= 1.9 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
2.00
1.00
1
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST BYPASS DA-A
Hyd. No. 6 -- 2 Year
120 240 360 480 600 720 840 960
Hyd No. 6
Wednesday, 01 / 25 / 2023
= 1.215 cfs
= 760 min
= 14,506 cuft
= 66
= 1665 ft
= 51.20 min
= Type II
= 484
Q (cfs)
2.00
1.00
1 ' 0.00
1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 7
POST DA-SCM#3
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 9.590 ac
Basin Slope
= 1.9 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0.00
0 120 240
Hyd No. 7
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA-SCM#3
Hyd. No. 7 -- 2 Year
360 480 600 720 840
Wednesday, 01 / 25 / 2023
= 4.827 cfs
= 736 min
= 23,682 cuft
= 80
= 1686 ft
= 35.10 min
= Type II
= 484
Q (cfs)
5.00
4.00
IM11111
2.00
1.00
' 0.00
960 1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 8
POST DA BYPASS SCM #3
Hydrograph type =
SCS Runoff
Storm frequency =
2 yrs
Time interval =
2 min
Drainage area =
1.130 ac
Basin Slope =
6.2 %
Tc method =
LAG
Total precip. =
2.20 in
Storm duration =
24 hrs
Q (cfs)
0.10
0.09
0.08
0.07
0.05
0.04
0.03
0.02
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA BYPASS SCM #3
Hyd. No. 8 -- 2 Year
Wednesday, 01 / 25 / 2023
= 0.041 cfs
= 724 min
= 475 cuft
= 61
= 227 ft
= 6.60 min
= Type II
= 484
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 8 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 9
POST DA BYPASS SCM#1
Hydrograph type =
SCS Runoff
Storm frequency =
2 yrs
Time interval =
2 min
Drainage area =
1.170 ac
Basin Slope =
6.6 %
Tc method =
LAG
Total precip. =
2.20 in
Storm duration =
24 hrs
Q (cfs)
0.10
0.09
0.08
0.07
0.05
0.04
0.03
0.02
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA BYPASS SCM#1
Hyd. No. 9 -- 2 Year
Wednesday, 01 / 25 / 2023
= 0.025 cfs
= 728 min
= 423 cuft
= 60
= 303 ft
= 8.20 min
= Type II
= 484
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 9 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 10
POST DA SCM#1
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 18.160 ac
Basin Slope
= 2.4 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA SCM#1
Wednesday, 01 / 25 / 2023
= 3.466 cfs
= 738 min
= 22,800 cuft
= 71
= 1436 ft
= 35.90 min
= Type II
= 484
Q (cfs) Hyd. No. 10 -- 2 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 10 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 11
POST DA-D
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 1.250 ac
Basin Slope
= 3.5 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
0.10
0.09
0.08
0.07
0.05
0.04
0.03
0.02
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA-D
Hyd. No. 11 -- 2 Year
Wednesday, 01 / 25 / 2023
= 0.025 cfs
= 744 min
= 452 cuft
= 60
= 509 ft
= 17.00 min
= Type II
= 484
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 11 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 12
POST DA SCM#2
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 7.680 ac
Basin Slope
= 2.3 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0.00
0 120 240
Hyd No. 12
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA SCM#2
Hyd. No. 12 -- 2 Year
360 480 600 720 840
Wednesday, 01 / 25 / 2023
= 4.047 cfs
= 730 min
= 16,480 cuft
= 78
= 1145 ft
= 24.60 min
= Type II
= 484
Q (cfs)
5.00
4.00
IM11111
2.00
1.00
0.00
960 1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 13
POST BYPASS DA SCM#2
Hydrograph type =
SCS Runoff
Storm frequency =
2 yrs
Time interval =
2 min
Drainage area =
12.750 ac
Basin Slope =
2.4 %
Tc method =
LAG
Total precip. =
2.20 in
Storm duration =
24 hrs
Q (cfs)
2.00
1.00
1
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST BYPASS DA SCM#2
Hyd. No. 13 -- 2 Year
120 240 360 480 600 720 840 960
Hyd No. 13
Wednesday, 01 / 25 / 2023
= 1.612 cfs
= 744 min
= 13,656 cuft
= 69
= 1640 ft
= 42.10 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 14
POST DA SCM#4
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 4.290 ac
Basin Slope
= 2.3 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA SCM#4
Wednesday, 01 / 25 / 2023
= 3.550 cfs
= 724 min
= 10,448 cuft
= 80
= 603 ft
= 13.90 min
= Type II
= 484
Q (cfs) Hyd. No. 14 -- 2 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 14 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 15
POST DA-E
Hydrograph type
= SCS Runoff
Storm frequency
= 2 yrs
Time interval
= 2 min
Drainage area
= 0.530 ac
Basin Slope
= 1.7 %
Tc method
= LAG
Total precip.
= 2.20 in
Storm duration
= 24 hrs
Q (cfs)
0.10
0.09
0.08
0.07
0.05
0.04
0.03
0.02
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA-E
Hyd. No. 15 -- 2 Year
Wednesday, 01 / 25 / 2023
= 0.011 cfs
= 748 min
= 195 cuft
= 60
= 474 ft
= 23.30 min
= Type II
= 484
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 15
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 16
POST THROUGH SCM#1
Hydrograph type =
Reservoir
Storm frequency =
2 yrs
Time interval =
2 min
Inflow hyd. No. =
10 -POST DA SCM#1
Reservoir name =
SCM #1
Storage Indication method used.
Q (cfs)
4.00
3.00
2.00
1.00
0.00 -'
0
Peak discharge
Time to peak
Hyd. volume
Max. Elevation
Max. Storage
POST THROUGH SCM#1
Hyd. No. 16 -- 2 Year
600 1200 1800 2400
Hyd No. 16 Hyd No. 10
Wednesday, 01 / 25 / 2023
= 0.106 cfs
= 1464 min
= 21,467 cuft
= 757.03 ft
= 18,577 cuft
3000 3600 4200 4800 5400
TTTTTT_II Total storage used = 18,577 cuft
Q (cfs)
4.00
3.00
2.00
1.00
1 0.00
6000
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 17
POST THROUGH SCM#2
Hydrograph type =
Reservoir
Storm frequency =
2 yrs
Time interval =
2 min
Inflow hyd. No. =
12 - POST DA SCM#2
Reservoir name =
SCM #2
Storage Indication method used.
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0.00 -'
0
Peak discharge
Time to peak
Hyd. volume
Max. Elevation
Max. Storage
POST THROUGH SCM#2
Hyd. No. 17 -- 2 Year
Wednesday, 01 / 25 / 2023
= 0.090 cfs
= 1450 min
= 15,439 cuft
= 761.85 ft
= 12,818 cuft
600 1200
1800
2400
3000 3600 4200
4800 5400
Hyd No. 17
Hyd No.
12
FFFM_II Total storage used =
12,818 cuft
Q (cfs)
5.00
4.00
3.00
2.00
1.00
1 0.00
6000
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 18
POST THROUGH SCM#3
Hydrograph type =
Reservoir
Storm frequency =
2 yrs
Time interval =
2 min
Inflow hyd. No. =
7 - POST DA-SCM#3
Reservoir name =
SCM #3
Storage Indication method used.
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0.00 -'
0
Peak discharge
Time to peak
Hyd. volume
Max. Elevation
Max. Storage
POST THROUGH SCM#3
Hyd. No. 18 -- 2 Year
600 1200 1800 2400
Hyd No. 18 Hyd No. 7
Wednesday, 01 / 25 / 2023
= 0.102 cfs
= 1460 min
= 20,637 cuft
= 755.00 ft
= 19,561 cuft
3000 3600 4200 4800 5400
FFFM_II Total storage used = 19,561 cuft
Q (cfs)
5.00
4.00
3.00
2.00
1.00
1 0.00
6000
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 19
POST THROUGH SCM#4
Hydrograph type =
Reservoir
Storm frequency =
2 yrs
Time interval =
2 min
Inflow hyd. No. =
14 - POST DA SCM#4
Reservoir name =
SCM #4
Storage Indication method used.
Q (cfs)
4.00
3.00
2.00
1.00
0.00 -'
0
Peak discharge
Time to peak
Hyd. volume
Max. Elevation
Max. Storage
POST THROUGH SCM#4
Hyd. No. 19 -- 2 Year
Wednesday, 01 / 25 / 2023
= 0.091 cfs
= 1142 min
= 10,387 cuft
= 763.84 ft
= 6,892 cuft
600 1200
1800
2400
3000 3600 4200
4800 5400
Hyd No. 19
Hyd No.
14
TTTTTT_II Total storage used
= 6,892 cuft
Q (cfs)
4.00
3.00
2.00
1.00
1 0.00
6000
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 20
COMBINED POST DA-A
Hydrograph type =
Combine
Peak discharge
= 1.306 cfs
Storm frequency =
2 yrs
Time to peak
= 760 min
Time interval =
2 min
Hyd. volume
= 35,619 cuft
Inflow hyds. =
6, 8, 18
Contrib. drain. area
= 19.450 ac
Q (cfs)
2.00
1.00
COMBINED POST DA-A
Hyd. No. 20 -- 2 Year
Q (cfs)
2.00
1.00
0.00 ' ' --1 1 1 1 1 0.00
0 600 1200 1800 2400 3000 3600 4200 4800 5400 6000
Time (min)
Hyd No. 20 Hyd No. 6 Hyd No. 8 Hyd No. 18
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 21
COMBINED POST DA-B
Hydrograph type =
Combine
Peak discharge
= 0.112 cfs
Storm frequency =
2 yrs
Time to peak
= 1440 min
Time interval =
2 min
Hyd. volume
= 21,891 cuft
Inflow hyds. =
9, 16
Contrib. drain. area
= 1.170 ac
COMBINED POST DA-B
Q (cfs) Hyd. No. 21 -- 2 Year
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 600
Hyd No. 21
1200 1800 2400
Hyd No. 9
3000 3600
Hyd No. 16
4200 4800 5400 6000V vv
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 22
COMBINED POST DA-C
Hydrograph type =
Combine
Peak discharge
= 1.741 cfs
Storm frequency =
2 yrs
Time to peak
= 744 min
Time interval =
2 min
Hyd. volume
= 39,482 cuft
Inflow hyds. =
13, 17, 19
Contrib. drain. area
= 12.750 ac
Q (cfs)
2.00
1.00
COMBINED POST DA-C
Hyd. No. 22 -- 2 Year
0.00 ' ' '
0 480 960 1440 1920 2400 2880 3360 3840 4320 4800
Hyd No. 22 Hyd No. 13 Hyd No. 17 Hyd No. 19
Q (cfs)
2.00
1.00
■0— 0.00
5280
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 23
TOTAL COMBINED PRE
Hydrograph type =
Combine
Peak discharge
= 3.179 cfs
Storm frequency =
2 yrs
Time to peak
= 758 min
Time interval =
2 min
Hyd. volume
= 44,024 cuft
Inflow hyds. =
1, 2, 3, 4, 5
Contrib. drain. area
= 74.870 ac
TOTAL COMBINED PRE
Q (cfs) Hyd. No. 23 -- 2 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 23 Hyd No. 1 Hyd No. 2 Hyd No. 3 Time (min)
Hyd No. 4 Hyd No. 5
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 24
TOTAL COMBINED POST
Hydrograph type =
Combine
Peak discharge
= 3.092 cfs
Storm frequency =
2 yrs
Time to peak
= 750 min
Time interval =
2 min
Hyd. volume
= 97,638 cuft
Inflow hyds. =
11, 15, 20, 21, 22
Contrib. drain. area
= 1.780 ac
Q (cfs)
4.00
3.00
2.00
1.00
0.00 -'
0
TOTAL COMBINED POST
Hyd. No. 24 -- 2 Year
600 1200 1800 2400 3000 3600 4200 4800 5400
Hyd No. 24 Hyd No. 11 Hyd No. 15 Hyd No. 20
Hyd No. 21 Hyd No. 22
Q (cfs)
4.00
3.00
2.00
1.00
1 0.00
6000
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 25
Post Total No Route
Hydrograph type
= Combine
Peak discharge
= 5.582 cfs
Storm frequency
= 2 yrs
Time to peak
= 738 min
Time interval
= 2 min
Hyd. volume
= 38,663 cuft
Inflow hyds.
= 6, 7, 8
Contrib. drain. area
= 29.040 ac
Q (cfs)
6.00
5.00
F
3.00
2.00
1.00
0.00 ' '
0 120 240
Hyd No. 25
Post Total No Route
Hyd. No. 25 -- 2 Year
360 480 600
Hyd No. 6
720
Q (cfs)
6.00
5.00
4.00
3.00
2.00
1.00
0.00
840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 7 Hyd No. 8
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 26
Post Total B no Route
Hydrograph type
= Combine
Peak discharge
= 3.489 cfs
Storm frequency
= 2 yrs
Time to peak
= 738 min
Time interval
= 2 min
Hyd. volume
= 23,224 cuft
Inflow hyds.
= 9, 10
Contrib. drain. area
= 19.330 ac
Post Total B no Route
Q (cfs) Hyd. No. 26 -- 2 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 26 Hyd No. 9 Hyd No. 10
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 27
Post Total C No Route
Hydrograph type
= Combine
Peak discharge
= 7.763 cfs
Storm frequency
= 2 yrs
Time to peak
= 726 min
Time interval
= 2 min
Hyd. volume
= 40,583 cuft
Inflow hyds.
= 12, 13, 14
Contrib. drain. area
= 24.720 ac
Q (cfs)
8.00
4.00
2.00
0.00 ' '
0 120 240
Hyd No. 27
Post Total C No Route
Hyd. No. 27 -- 2 Year
360 480 600
Hyd No. 12
720
Q (cfs)
8.00
4.00
2.00
0.00
840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 13 Hyd No. 14
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Wednesday, 01 / 25 / 2023
Hyd. No. 28
Post Total Combined Before Routing
Hydrograph type = Combine Peak discharge = 15.42 cfs
Storm frequency = 2 yrs Time to peak = 734 min
Time interval = 2 min Hyd. volume = 103,117 cuft
Inflow hyds. = 11, 15, 25, 26, 27 Contrib. drain. area = 1.780 ac
Post Total Combined Before Routing
Q (cfs) Hyd. No. 28 -- 2 Year Q (cfs)
18.00 18.00
15.00 15.00
12.00 12.00
9.00 9.00
6.00 - 6.00
3.00 3.00
0.00 L0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 28 Hyd No. 11 Hyd No. 15 Hyd No. 25 Time (min)
Hyd No. 26 Hyd No. 27
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 1
PRE DA-A
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 25.950 ac
Basin Slope
= 2.0 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
18.00
15.00
12.00
•M
am
3.00
0.00 ' '
0 120 240
Hyd No. 1
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-A
Hyd. No. 1 -- 10 Year
Wednesday, 01 / 25 / 2023
= 15.29 cfs
= 748 min
= 105,954 cuft
= 64
= 1594 ft
= 50.90 min
= Type II
= 484
Q (cfs)
18.00
15.00
12.00
M
3.00
i i i , I I I I I I I ` 1 0.00
360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 2
PRE DA-B
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 25.710 ac
Basin Slope
= 3.1 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
14.00
12.00
10.00
• 11
4.00
2.00
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-B
Hyd. No. 2 -- 10 Year
Wednesday, 01 / 25 / 2023
= 13.17 cfs
= 744 min
= 87,194 cuft
= 61
= 1635 ft
= 45.00 min
= Type II
= 484
Q (cfs)
14.00
12.00
10.00
• 11
4.00
2.00
0.00 ' 1 1 1 1 1
" ' ' ' ' ' ' N. ' 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 2 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 3
PRE DA-C
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 19.820 ac
Basin Slope
= 2.4 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
18.00
15.00
12.00
•M
am
3.00
0.00 '
0 120 240
Hyd No. 3
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-C
Hyd. No. 3 -- 10 Year
Wednesday, 01 / 25 / 2023
= 15.66 cfs
= 740 min
= 89,951 cuft
= 66
= 1517 ft
= 42.80 min
= Type II
= 484
Q (cfs)
18.00
15.00
12.00
M
3.00
i i i f I I I I I I I ` 1 0.00
360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 4
PRE DA-D
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 1.410 ac
Basin Slope
= 3.5 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
2.00
1.00
1
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-D
Hyd. No. 4 -- 10 Year
120 240 360 480 600 720 840 960
Hyd No. 4
Wednesday, 01 / 25 / 2023
= 1.215 cfs
= 726 min
= 4,543 cuft
= 60
= 509 ft
= 17.00 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 5
PRE DA-E
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 1.980 ac
Basin Slope
= 2.2 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
2.00
1.00
1
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
PRE DA-E
Hyd. No. 5 -- 10 Year
120 240 360 480 600 720 840 960
Hyd No. 5
Wednesday, 01 / 25 / 2023
= 1.906 cfs
= 724 min
= 6,220 cuft
= 60
= 358 ft
= 16.20 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 6
POST BYPASS DA-A
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 18.320 ac
Basin Slope
= 1.9 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
14.00
12.00
10.00
.M
4.00
2.00
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST BYPASS DA-A
Hyd. No. 6 -- 10 Year
Wednesday, 01 / 25 / 2023
= 12.40 cfs
= 748 min
= 82,995 cuft
= 66
= 1665 ft
= 51.20 min
= Type II
= 484
Q (cfs)
14.00
12.00
10.00
8.00
6.00
4.00
2.00
0.00 ' ' ' ' ' ' ' ' I%- ' 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 6 Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 7
POST DA-SCM#3
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 9.590 ac
Basin Slope
= 1.9 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
18.00
15.00
12.00
•M
am
3.00
0.00 '
0 120 240
Hyd No. 7
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA-SCM#3
Hyd. No. 7 -- 10 Year
Wednesday, 01 / 25 / 2023
= 17.02 cfs
= 734 min
= 77,436 cuft
= 80
= 1686 ft
= 35.10 min
= Type II
= 484
Q (cfs)
18.00
15.00
12.00
M
3.00
i —r I I I I I I I` 1 0.00
360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 8
POST DA BYPASS SCM #3
Hydrograph type =
SCS Runoff
Storm frequency =
10 yrs
Time interval =
2 min
Drainage area =
1.130 ac
Basin Slope =
6.2 %
Tc method =
LAG
Total precip. =
4.25 in
Storm duration =
24 hrs
Q (cfs)
2.00
1.00
1
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA BYPASS SCM #3
Hyd. No. 8 -- 10 Year
120 240 360 480 600 720 840 960
Hyd No. 8
Wednesday, 01 / 25 / 2023
= 1.571 cfs
= 720 min
= 3,867 cuft
= 61
= 227 ft
= 6.60 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 9
POST DA BYPASS SCM#1
Hydrograph type =
SCS Runoff
Storm frequency =
10 yrs
Time interval =
2 min
Drainage area =
1.170 ac
Basin Slope =
6.6 %
Tc method =
LAG
Total precip. =
4.25 in
Storm duration =
24 hrs
Q (cfs)
2.00
1.00
1
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA BYPASS SCM#1
Hyd. No. 9 -- 10 Year
120 240 360 480 600 720 840 960
Hyd No. 9
Wednesday, 01 / 25 / 2023
= 1.507 cfs
= 720 min
= 3,770 cuft
= 60
= 303 ft
= 8.20 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 10
POST DA SCM#1
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 18.160 ac
Basin Slope
= 2.4 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
24.00
20.00
16.00
12.00
M
4.00
0.00
0 120 240
Hyd No. 10
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA SCM#1
Hyd. No. 10 -- 10 Year
Wednesday, 01 / 25 / 2023
= 21.58 cfs
= 736 min
= 102,177 cuft
= 71
= 1436 ft
= 35.90 min
= Type II
= 484
Q (cfs)
24.00
20.00
16.00
12.00
4.00
i i i i I I I I I I` 1 0.00
360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 11
POST DA-D
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 1.250 ac
Basin Slope
= 3.5 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
2.00
1.00
1
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA-D
Hyd. No. 11 -- 10 Year
120 240 360 480 600 720 840 960
Hyd No. 11
Wednesday, 01 / 25 / 2023
= 1.077 cfs
= 726 min
= 4,027 cuft
= 60
= 509 ft
= 17.00 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 12
POST DA SCM#2
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 7.680 ac
Basin Slope
= 2.3 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
18.00
15.00
12.00
•M
am
3.00
0.00 ' '
0 120 240
Hyd No. 12
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA SCM#2
Hyd. No. 12 -- 10 Year
Wednesday, 01 / 25 / 2023
= 15.51 cfs
= 728 min
= 57,302 cuft
= 78
= 1145 ft
= 24.60 min
= Type II
= 484
Q (cfs)
18.00
15.00
12.00
M
3.00
i I I I I I I -rl%. 1 0.00
360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 13
POST BYPASS DA SCM#2
Hydrograph type =
SCS Runoff
Storm frequency =
10 yrs
Time interval =
2 min
Drainage area =
12.750 ac
Basin Slope =
2.4 %
Tc method =
LAG
Total precip. =
4.25 in
Storm duration =
24 hrs
Q (cfs)
14.00
12.00
10.00
• 11
4.00
2.00
0.00
0 120 240
Hyd No. 13
360 480
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST BYPASS DA SCM#2
Hyd. No. 13 -- 10 Year
Wednesday, 01 / 25 / 2023
= 12.12 cfs
= 740 min
= 66,910 cuft
= 69
= 1640 ft
= 42.10 min
= Type II
= 484
Q (cfs)
14.00
12.00
10.00
• 11
4.00
2.00
i I I I I I I I I '%� 1 0.00
600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 14
POST DA SCM#4
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 4.290 ac
Basin Slope
= 2.3 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
14.00
12.00
10.00
• 11
4.00
2.00
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA SCM#4
Hyd. No. 14 -- 10 Year
Wednesday, 01 / 25 / 2023
= 12.19 cfs
= 722 min
= 34,163 cuft
= 80
= 603 ft
= 13.90 min
= Type II
= 484
Q (cfs)
14.00
12.00
10.00
• 11
4.00
2.00
0.00 ' ' ' ' ' 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 14
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 15
POST DA-E
Hydrograph type
= SCS Runoff
Storm frequency
= 10 yrs
Time interval
= 2 min
Drainage area
= 0.530 ac
Basin Slope
= 1.7 %
Tc method
= LAG
Total precip.
= 4.25 in
Storm duration
= 24 hrs
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0 00
Peak discharge
Time to peak
Hyd. volume
Curve number
Hydraulic length
Time of conc. (Tc)
Distribution
Shape factor
POST DA-E
Hyd. No. 15 -- 10 Year
Wednesday, 01 / 25 / 2023
= 0.412 cfs
= 728 min
= 1,738 cuft
= 60
= 474 ft
= 23.30 min
= Type II
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0 00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 15
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 16
POST THROUGH SCM#1
Hydrograph type =
Reservoir
Peak discharge
Storm frequency =
10 yrs
Time to peak
Time interval =
2 min
Hyd. volume
Inflow hyd. No. =
10 - POST DA SCM#1
Max. Elevation
Reservoir name =
SCM #1
Max. Storage
Storage Indication method used
Q (cfs)
24.00
20.00
16.00
12.00
m
4.00
0.00 '
0 120 240
Hyd No. 16
POST THROUGH SCM#1
Hyd. No. 16 -- 10 Year
Wednesday, 01 / 25 / 2023
= 13.12 cfs
= 756 min
= 97,527 cuft
= 757.89 ft
= 35,967 cuft
Q (cfs)
24.00
20.00
16.00
12.00
4.00
i i I I I I I N1-i 0.00
360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 10 €_€_€_€_€_€_I Total storage used = 35,967 cuft
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 17
POST THROUGH SCM#2
Hydrograph type =
Reservoir
Storm frequency =
10 yrs
Time interval =
2 min
Inflow hyd. No. =
12 - POST DA SCM#2
Reservoir name =
SCM #2
Storage Indication method used
Q (cfs)
18.00
15.00
12.00
• 11
. 11
3.00
0.00 ' r
0 600
Hyd No. 17
Peak discharge
Time to peak
Hyd. volume
Max. Elevation
Max. Storage
POST THROUGH SCM#2
Hyd. No. 17 -- 10 Year
1200 1800 2400
Hyd No. 12
Wednesday, 01 / 25 / 2023
= 0.788 cfs
= 904 min
= 53,188 cuft
= 763.22 ft
= 35,984 cuft
3000 3600 4200 4800 5400
I_I_I_I_I_I_I Total storage used = 35,984 cuft
Q (cfs)
18.00
15.00
12.00
• 11
. 11
3.00
1 0.00
6000
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Hyd. No. 18
POST THROUGH SCM#3
Hydrograph type =
Reservoir
Peak discharge
Storm frequency =
10 yrs
Time to peak
Time interval =
2 min
Hyd. volume
Inflow hyd. No. =
7 - POST DA-SCM#3
Max. Elevation
Reservoir name =
SCM #3
Max. Storage
Storage Indication method used
Q (cfs)
18.00
15.00
12.00
• 11
. 11
3.00
0.00
0 600
Hyd No. 18
POST THROUGH SCM#3
Hyd. No. 18 -- 10 Year
Wednesday, 01 / 25 / 2023
= 2.607 cfs
= 786 min
= 73,007 cuft
= 756.08 ft
= 42,894 cuft
Q (cfs)
18.00
15.00
12.00
• 11
. 11
3.00
-'I 10.00
1200 1800 2400 3000 3600 4200 4800 5400 6000
Time (min)
Hyd No. 7 I_I_I_I_I_I_I Total storage used = 42,894 cuft
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 19
POST THROUGH SCM#4
Hydrograph type =
Reservoir Peak discharge
= 0.173 cfs
Storm frequency =
10 yrs Time to peak
= 1392 min
Time interval =
2 min Hyd. volume
= 33,247 cuft
Inflow hyd. No. =
14 - POST DA SCM#4 Max. Elevation
= 765.78 ft
Reservoir name =
SCM #4 Max. Storage
= 26,637 cuft
Storage Indication method used.
POST THROUGH SCM#4
Q (cfs)
Hyd. No. 19 -- 10 Year
Q (cfs)
14.00
14.00
12.00
12.00
10.00
10.00
8.00
8.00
6.00
6.00
4.00
4.00
2.00
2.00
0.00
0.00
0 600 1200
1800 2400 3000 3600 4200
4800 5400
6000
Hyd No. 19
Hyd No. 14 �I Total storage used
= 26,637 cuft
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 20
COMBINED POST DA-A
Hydrograph type =
Combine
Peak discharge
= 13.52 cfs
Storm frequency =
10 yrs
Time to peak
= 748 min
Time interval =
2 min
Hyd. volume
= 159,870 cuft
Inflow hyds. =
6, 8, 18
Contrib. drain. area
= 19.450 ac
COMBINED POST DA-A
Q (cfs) Hyd. No. 20 -- 10 Year Q (cfs)
14.00 14.00
12.00 12.00
10.00 10.00
8.00 8.00
6.00 6.00
4.00 4.00
2.00 2.00
0.00 0.00
0 240 480 720 960 1200 1440 1680 1920
Time (min)
Hyd No. 20 Hyd No. 6 Hyd No. 8 Hyd No. 18
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 21
COMBINED POST DA-B
Hydrograph type =
Combine
Peak discharge
= 13.29 cfs
Storm frequency =
10 yrs
Time to peak
= 756 min
Time interval =
2 min
Hyd. volume
= 101,297 cuft
Inflow hyds. =
9, 16
Contrib. drain. area
= 1.170 ac
Q (cfs)
14.00
12.00
10.00
RIM
4.00
2.00
0.00 ' '
0 120 240
Hyd No. 21
COMBINED POST DA-B
Hyd. No. 21 -- 10 Year
Q (cfs)
14.00
12.00
10.00
lllll• 11
4.00
2.00
`~ 0.00
360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 9 Hyd No. 16
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 22
COMBINED POST DA-C
Hydrograph type =
Combine
Peak discharge
= 12.41 cfs
Storm frequency =
10 yrs
Time to peak
= 740 min
Time interval =
2 min
Hyd. volume
= 153,344 cuft
Inflow hyds. =
13, 17, 19
Contrib. drain. area
= 12.750 ac
COMBINED POST DA-C
Q (cfs) Hyd. No. 22 -- 10 Year Q (cfs)
14.00 14.00
12.00 12.00
10.00 10.00
8.00 8.00
6.00 6.00
4.00 4.00
2.00 2.00
0.00 0.00
0 480 960 1440 1920 2400 2880 3360 3840 4320 4800
Time (min)
Hyd No. 22 Hyd No. 13 Hyd No. 17 Hyd No. 19
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 23
TOTAL COMBINED PRE
Hydrograph type =
Combine
Peak discharge
= 44.31 cfs
Storm frequency =
10 yrs
Time to peak
= 744 min
Time interval =
2 min
Hyd. volume
= 293,862 cuft
Inflow hyds. =
1, 2, 3, 4, 5
Contrib. drain. area
= 74.870 ac
TOTAL COMBINED PRE
Q (cfs) Hyd. No. 23 -- 10 Year Q (cfs)
50.00 50.00
40.00 40.00
30.00 30.00
20.00 20.00
10.00 10.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 23 Hyd No. 1 Hyd No. 2 Hyd No. 3 Time (min)
Hyd No. 4 — Hyd No. 5
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 24
TOTAL COMBINED POST
Hydrograph type =
Combine
Peak discharge
= 37.51 cfs
Storm frequency =
10 yrs
Time to peak
= 752 min
Time interval =
2 min
Hyd. volume
= 420,276 cuft
Inflow hyds. =
11, 15, 20, 21, 22
Contrib. drain. area
= 1.780 ac
Q (cfs)
40.00
30.00
20.00
10.00
0.00 -'
0
TOTAL COMBINED POST
Hyd. No. 24 -- 10 Year
360 720 1080 1440
Hyd No. 24 — Hyd No. 11
Hyd No. 21
1800 2160
Hyd No. 15
Hyd No. 22
2520 2880 3240
Hyd No. 20
Q (cfs)
40.00
30.00
20.00
10.00
0.00
3600
Time (min)
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 25
Post Total No Route
Hydrograph type
= Combine
Peak discharge
= 27.51 cfs
Storm frequency
= 10 yrs
Time to peak
= 738 min
Time interval
= 2 min
Hyd. volume
= 164,298 cuft
Inflow hyds.
= 6, 7, 8
Contrib. drain. area
= 29.040 ac
Post Total No Route
Q (cfs) Hyd. No. 25 -- 10 Year Q (cfs)
28.00 28.00
24.00 24.00
20.00 20.00
16.00 16.00
12.00 12.00
8.00 8.00
4.00 4.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 25 Hyd No. 6 Hyd No. 7 Hyd No. 8
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 26
Post Total B no Route
Hydrograph type
= Combine
Peak discharge
= 21.87 cfs
Storm frequency
= 10 yrs
Time to peak
= 736 min
Time interval
= 2 min
Hyd. volume
= 105,946 cuft
Inflow hyds.
= 9, 10
Contrib. drain. area
= 19.330 ac
Q (cfs)
24.00
20.00
16.00
12.00
M
4.00
0.00 ' '
0 120 240
Hyd No. 26
Post Total B no Route
Hyd. No. 26 -- 10 Year
360 480 600
Hyd No. 9
720
Q (cfs)
24.00
20.00
16.00
12.00
4.00
0.00
840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 10
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022
Wednesday, 01 / 25 / 2023
Hyd. No. 27
Post Total C No Route
Hydrograph type
= Combine
Peak discharge
= 33.79 cfs
Storm frequency
= 10 yrs
Time to peak
= 726 min
Time interval
= 2 min
Hyd. volume
= 158,375 cuft
Inflow hyds.
= 12, 13, 14
Contrib. drain. area
= 24.720 ac
Post Total C No Route
Q (cfs) Hyd. No. 27 -- 10 Year Q (cfs)
35.00 35.00
30.004 1 30.00
25.00 25.00
20.00 20.00
15.00 15.00
10.00 10.00
5.00 5.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 27 Hyd No. 12 Hyd No. 13 Hyd No. 14
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Wednesday, 01 / 25 / 2023
Hyd. No. 28
Post Total Combined Before Routing
Hydrograph type = Combine Peak discharge = 79.51 cfs
Storm frequency = 10 yrs Time to peak = 734 min
Time interval = 2 min Hyd. volume = 434,385 cuft
Inflow hyds. = 11, 15, 25, 26, 27 Contrib. drain. area = 1.780 ac
Q (cfs
80.00
70.00
.1 11
50.00
40.00
30.00
20.00
10.00
Q (cfs)
80.00
70.00
•1 11
50.00
40.00
30.00
20.00
10.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 28 Hyd No. 11 Hyd No. 15 Hyd No. 25 Time (min)
Hyd No. 26 — Hyd No. 27